This August 2015 artist's rendering provided by NASA/JPL-Caltech depicts the InSight Mars lander studying the interior of Mars. On Wednesday, March 9, 2016, NASA said it's shooting for a 2018 launch of the InSight spacecraft. The robotic lander was supposed to lift off in March 2016, but was grounded in December by a leak in a French instrument. Project managers said the device should be redesigned in time. (Photo by NASA/JPL-Caltech via AP Photo)

Migrant children cross railway tracks under a freight train during rainfall at the northern Greek border station of Idomeni, Wednesday, March 9, 2016. Despair and confusion spread through the camp at the Greek-Macedonian border as thousands of stranded refugees were forced to acknowledge that the route through Europe that had carried their hopes and dreams was now shut. (Photo by Vadim Ghirda/AP Photo)

Somali police officers carry a suspected suicide car bomber wounded in a bombing outside a police academy in Mogadishu, Somalia, Wednesday, March 9, 2016. A Somali police official said three police officers and one civilian have been killed in the car bombing. Gen. Ali Hersi Barre said that the suicide car bomber detonated an explosives-laden vehicle outside a cafe near the academy. (Photo by Farah Abdi Wasameh/AP Photo)

Basketball star and health advocate Stephen Curry teams up with Drink Up and Brita to celebrate his drink of choice, water, at Martin Luther King Jr. Elementary School in Oakland, Calif. on Tuesday, March 8, 2016. (Photo by Adm Golub/Invision for Brita/AP Images)

A girl walks by large puddles carrying a baby and rations of hot soup during a heavy rain at the northern Greek border station of Idomeni, Wednesday, March 9, 2016. Northbound borders are closed and authorities plan to distribute fliers telling refugees seeking to reach central Europe that “there is no hope of you continuing north, therefore come to the camps where we can provide assistance” as more than 36,000 transient migrants are thought to be stuck in financially struggling Greece. (Photo by Vadim Ghirda/AP Photo)

Iraqi Defense Minister Khaled al-Obeidi, center, arrives at a military a base outside Tikrit, 130 kilometers (80 miles) north of Baghdad, Iraq, Wednesday, March 9, 2016. Al-Obeidi played down fears of the Islamic State groups chemical weapons capabilities, saying the group lacks chemical capabilities. The attacks the group has carried were only intended to hurt the morale of our fighters, as they have so far not caused any casualties he said. (Photo by Hadi Mizban/AP Photo)

Indigenous women line up during a demonstration to mark International Women's Day at Revolucion monument in Mexico City, Mexico March 8, 2016. (Photo by Edgard Garrido/Reuters)

A woman cooks plantains near a crime scene at the Simon Bolivar Park in San Salvador, El Salvador March 8, 2016. (Photo by Jose Cabezas/Reuters)

The mascots of the Democratic and Republican parties, a donkey for the Democrats and an elephant for the GOP, are seen on a video screen at Democratic U.S. presidential candidate Hillary Clinton's campaign rally in Cleveland, Ohio March 8, 2016. (Photo by Carlos Barria/Reuters)

Police stand around the body of a Palestinian involved in a shooting attack in Jerusalem Wednesday, March 9, 2016. Israeli police say two Palestinian gunmen carried out shootings in Jerusalem and were shot and killed by police. One Palestinian man was shot and seriously wounded by the gunmen, police say. (Photo by Mahmoud Illean/AP Photo)

An ultra-Orthodox Jewish onlooker stands near Israeli mounted police near the scene where Israeli police said two Palestinian assailants carried out a drive-by shooting on cars before being shot dead by police opposite the Notre Dame Center just outside Jerusalem's Old City March 9, 2016. (Photo by Ammar Awad/Reuters)

A woman looks through a tent during a gathering by Houthi loyalists against Saudi-led air strikes in Yemen's capital Sanaa March 9, 2016. (Photo by Khaled Abdullah/Reuters)

North Korean leader Kim Jong Un meets scientists and technicians in the field of researches into nuclear weapons in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang March 9, 2016. (Photo by Reuters/KCNA)

Smoke billows from a building after a Taliban attack in Gereshk district of Helmand province, Afghanistan March 9, 2016. (Photo by Abdul Malik/Reuters)

An Emirates Airlines flight attendant assists a visitor using a Gear VR virtual reality headset by Oculus and Samsung Electronics, at the Emirates Airlines exhibition stand during the International Tourism Trade Fair (ITB) in Berlin, Germany, March 9, 2016. (Photo by Fabrizio Bensch/Reuters)

Two people stand in front of an oversized photo of two people snorkeling in the South Pacific at the booth from Tahiti during the ITB Berlin international travel trade show in Berlin, Germany, 09 March 2016. Around 10,000 exhibitors from more than 180 countries are presenting their new offers in the travel industry from 09 until 13 March 2016. The Maldives are the official partner country at the ITB this year. (Photo by Soeren Stache/EPA)

Visitors listen to communication android “Chihira Kanae” (C) at an information counter at the International Tourism Trade Fair (ITB) in Berlin, Germany, March 9, 2016. “Chihira Kanae”, which was created by Toshiba, has her own information counter where she welcomes visitors through two way communication, provides information on the trade fair and answers any questions visitors may have in English, German, Japanese and Chinese. (Photo by Fabrizio Bensch/Reuters)

Students ride on a pick-up truck after leaving the Freedom School, in the town of al-Tamanah, in the southern countryside of Idlib, Syria, March 9, 2016. This school was converted from a poultry farm by the residents of the town more than a year ago. (Photo by Khalil Ashawi/Reuters)

Students attend a class inside the Freedom School, in the town of al-Tamanah, in the southern countryside of Idlib, Syria, March 9, 2016. (Photo by Khalil Ashawi/Reuters)

People push a car through flood waters during a rain storm in Dubai March 9, 2016. (Photo by Ahmed Jadallah/Reuters)

A Palestinian woman looks out of her window as she watches the funeral of Palestinian Ahmad Aamer, 16, who the Israeli military said was shot dead by Israeli soldiers after he tried to stab them, in the West Bank village of Mas'ha near Salfit March 9, 2016. (Photo by Abed Omar Qusini/Reuters)

A F-16 Fighting Falcon fighter jet takes part in a flying display during the 49th Paris Air Show at the Le Bourget airport near Paris, in this file photo taken June 25, 2011. U.S. Senator Ben Cardin, the top Democrat on the Senate Foreign Relations Committee, said on Wednesday he does not expect an upcoming vote on a $700 million sale of F-16 fighter jets to Pakistan to keep the deal from going ahead. (Photo by Gonzalo Fuentes/Reuters)

David Lordkipanidze of the Georgian Academy of Sciences shows a 1.75-million-year-old skull and jawbone excavated near the town of Dmanisi, some 85 kms south west of Tbilisi, Georgia, in this July 8, 2002 file photo. Scientists said in a study published March 9, 2016, the advent of meat-eating combined with the use of simple tone tools to make food easier to consume meant that members of the human lineage about 2.5 million years ago all of a sudden had less need for chewing. (Photo by David Mdzinarishvili/Reuters)

A handout photo provided by the European Southern Observatory on March 7, 2016 shows the sharpest view ever of the dusty disc around the close pair of aging stars IRAS 08544-4431 obtained by the Very Large Telescope Interferometer at ESO’s Paranal Observatory in Chile. For the first time such discs can be compared to the discs around young stars – and they look surprisingly similar. It is even possible that a disc appearing at the end of a star’s life might also create a second generation of planets. The inset shows the VLTI reconstructed image, with the brighter central star removed. The background view shows the surroundings of this star in the constellation of Vela (The Sails). (Photo by AFP Photo/European Southern Observatory/Digitized Sky Survey 2)

Marieke van der Meer from the Netherlands works on her sculpture “Flora” at the sand sculpture show in Binz on Ruegen island, Germany, 09 March 2016. With the motto “Fascination Nature”, 50 sand artists have created oversized sculptures. The sculptors use 16,000 tons of special sand that is pressed into big blocks first and then formed. The 7th sand sculpture show on 5,600 square meters of exhibition ground opens on 12 March 2016. (Photo by Ens Buettner/EPA)

Wiaczeslaw Borecki from Poland is working on a walrus at the sand sculpture show in Binz on Ruegen island, Germany, Wednesday, March 9, 2016. With the motto “Fascination Nature”, 50 sand artists create sand sculptures that lead to the five continents of planet Earth. (Photo by Jens Buettner/DPA via AP Photo)

Beatles fans cross the famous Abbey Road zebra crossing to pay their respects to Beatles producer George Martin at Abbey Road Studios in London, Britain, 09 March 2016. George Martin, a British music producer best known for his work with The Beatles during the 1960s, has died aged 90. Martin influenced The Beatles' sound after taking them on when he heard their demo tape in 1962. He is credited with 30 number one singles for The Beatles and other artists. (Photo by Andy Rain/EPA)

Refugees arrive on a rubber boat from Turkey on the Greek island of Lesbos, near the port city of Mytilene, Greece, 09 March 2016. Overnight several boats landed on the beaches in the south of the island. (Photo by Kay Nietfeld/EPA)

In this photo obtained from the Iranian Fars News Agency, a Qadr H long-range ballistic surface-to-surface missile is fired by Iran's powerful Revolutionary Guard, during a maneuver, in an undisclosed location in Iran, Wednesday, March 9, 2016. Irans powerful Revolutionary Guard test-fired two ballistic missiles Wednesday with the phrase “Israel must be wiped out” written on them, a show of deterrence power by the Islamic Republic as U.S. Vice President Joe Biden visited Israel, the semi-official Fars news agency reported. (Photo by Omid Vahabzadeh/AP Photo/Fars News Agency)

This photo provided by Dan McGlaun shows the full shadow of the moon during the total solar eclipse on Tuesday, March 8, 2016, as seen from an airplane over the North Pacific Ocean. So-called eclipse chasers boarded a special flight from Anchorage to Honolulu to view the eclipse on Tuesday from the air. (Photo by Dan McGlaun/eclipse2017.org via AP Photo)

A security guard stands guard on one of the totally empty main streets at dusk in rainy Namie, a town north of Tokyo Electric Power Company's Fukushima Daiichi Nuclear Power Plant, Fukushima Prefecture, northern Japan, 09 March 2016. Japan will mark the fifth anniversary of the earthquake and tsunami on 11 March 2016. According to Japan's National Police Agency, a total of 15,894 people were killed in the disaster and 2,562 are still missing as of February 2016. A group of 174,471 people are still living in shelters, according to records. (Photo by Kimimasa Mayama/EPA)

Barbie dolls are displayed during the exhibition “Barbie, life of an icon” at the Museum of Decorative Arts as part of the Paris Fashion Week Womenswear Fall/Winter 2016/2017 on March 9, 2016 in Paris, France. More than 700 Barbie dolls are displayed during the exhibition which takes place from March 10 to September 18, 2016. (Photo by Thierry Chesnot/Getty Images)

A clown doctor performs for a child patient during a visit at Abdel Aziz Al-Rantisi hospital in Gaza City, March 9, 2016. (Photo by Mohammed Talatene/Getty Images/Anadolu Agency)

Firefighters salute as the hearse carrying the body of Nancy Reagan makes its way to the Ronald Reagan Presidential Library on March 9, 2016 near Porter Ranch, California. The former first lady passed away at her Bel Air, California home at the age of 94. (Photo by Jae C. Hong- Pool/Getty Images)

Women take part in the commemoration of the International Women's Day, in Santiago on March 8, 2016. (Photo by Martin Bernetti/AFP Photo)